Drop-box loom



A. A.-DAVENPORT.

DROP BOX LOOM.

APPLICATION. FILED MAR.15| 1920.

Patented June 15, 1920.

A. A. DAVENPORT. DROP BOX LOOM. APPLICATION, man M.A.R.15, 1920.

Patented June 15, 1920.

2 SHEETS-SHEET 2- UNITED STATES PATENT OFFICE.

DROP-BOX LOOM.

Specification of Letters Patent.

Patented June 15, 1920.

Application filed March 15, 1920. Serial No. 365,897.

To all whom it may concern:

Be it known that I, ARTHUR A. DAVEN- PORT, a citizen of the UnitedStates, residing at Lookport, in the county of Niagara and State of NewYork, have invented a new and useful Improvement in Drop-Box Looms, ofwhich the following is a specification.

This invention relates to looms or weaving machines, and moreparticularly to drop box looms having jacquard machines or other patternmaking mechanism attached.

The objects of the invention. are to produce a machine of this kind inwhich the weft or filling may be omitted when desired to facilitate thework of hemstitching the woven material; also to provide a mechanism ofthis kind which can be operated by means of the pattern cards of ajacquard machine or other pattern making mechanism in such a manner thatthe filling or weft threads can be omitted without stopping the loom bymeans of the usual automatic stop motion; also to improve weavingmechanism of this kind in other respects hereinafter specified.

In weaving toweling or other material which is to be hemstitched, it iscustomary at the present time to loosely weave by means of a separateshuttle, one or more weft threads or fillings into the portions of thematerial which are to be hemstitched, and these threads must be cut anddrawn before the material can be hemstitched, which involves aconsiderable amount of labor and expense. It is necessary with looms asheretofore made, to insert these loose weft threads into the parts to behemstitched, since if the filling or weft thread were omitted the stopmotion or filling detecting mechanism would stop the loom.

In the accompanying drawings:

Figure 1 is a longitudinal sectional view, partly diagrammatic, of aweft thread omitting mechanism embodying the invention.

Fig. 2 is a fragmentary top plan view thereof showing the fork withwhich the weft or filling cooperates to control the stop motion of theloom.

Fig. 3 is a fragmentary longitudinal sectional view thereof, showing theparts of the mechanism'in the positions which they occupy when themachine is operating to omit weft or filling.

Fig. 4 is a fragmentary perspective View thereof. a

Fig. 5 is a fragmentary View of a weft thread omitting mechanism ofslightly modified construction.

The invention is shown in the accompanymg drawings as applied to a dropbox loom having a jacquard machine attached, but it 1s not intended tolimit the invention to use with this type of machines.

A represents the usual breast beam of a loom and B represents a fillingor weft fork having the usual hooked portion or extension Z) and theforked end portion 6, with which the weft or filling is adapted tocooperate to hold the hooked extension I) out of engagement with anoscillatory lever G when the shuttles are provided with a thread, and topermit this extension to engage the lever C when the thread breaks orthe weft is omitted, thereby actuating the usual stop motion (not shown)to stop the machine. The oscillatory lever G is pivoted at 0 and has anextension or arm a which engages a rotary cam 0 by means of which thearm 0, and lever C receive oscillatory motion. The operation of the loomis preferably con trolled by means of a jacquard mechanism which isdiagrammatically shown in Fig. -1, and in which D represents thecylinder, D the needle board and a? the pattern cards. E E representneedles which are connected with the usual hooks e e and are adapted tomove the hooks into operative relations to knives 6 when the needlespass through holes in the pattern cards. All of these parts haveheretofore been used on looms and of themselves form no part of thisinvention.

In order to enable the loom to operate for an interval of time without aweft or filling, and thus produce a part in the fabric which can behemstitched without necessitating the removing of weft threads, meansare provided for rendering'stop motion inoperative while this part ofthe fabric is being formed. This can be accomplished by preventing theextension 6 of the fork B from engaging the lever C when the filling orweft is omitted. In the construction shown in Figs. 1-4, this isaccomplished in the following manner:

A lever F is pivoted at f on the breast beam Av or other fixed part ofthe loom and an arm or standard f extends upwardly from this lever andinto operative relation to the extension I) of the fork. In theconstruction shown, the upper end of the standard is. provided with ahead or enlarged portion f adapted to cooperate with an enlargement orprojection on the extension 6 of the fork, so that when the outer end ofthe lever F is swung upwardly, the extension I) of the fork will be heldin a position in which the lever C cannot engage therewith. When thefork is held in this position, an

empty shuttle can be used, thus omitting the weft or filling from thefabric. 7 represents a guide r d, secured at one end to the breast beamA and having an-eye in the other end thereof through'w-hich the standardf extends.

In order to actuate the lever F automatically from the jacquardmechanism, one of the hooks of this mechanism, for example the hook e,is connected by means ofa cord or wire 9 to a'be'l-l crank-or boxraising lever G, one arm gof which is connected by means of a cord orwireg with'the usual box raising'motion (not shown), to cause emptyshuttle to housed in theloom. The other arm 9 of the bell' crank lever Gis connected bymeans of a wire-or cord to the end of the fork actuatinglever F. In this manner the same mechanism which actuates the boxraising motion also prevents the actuation of the-stop motion. The bellcrank lever G is held in its operative position as shown in Fig. 3 bymeans of a detent lever H, which has an arm h adapted to engage aprojection or shoulder'h on the lever G, when this lever is inoperativeposition. The other arm of the lever H is connected by a wire or cord kto the other hook 6, so that when the hook e is raised by the knife, thedetent lever will be swung out of engagement with the projection it,thus releasing the bell crank lever Gr. Bothof the hooks e e arecontrolled in the usual manner by the pattern cards of the jacquardmechanism so that the interval during which an empty shuttle is used andthe stop motion is rendered inoperative, is controlled by means of thepattern cards. If it is desired, the empty shuttle may be omitted and anempty shuttle box thus brought into operative relation to the lay levelof the loom. hen this is done it is necessary to tie or otherwise holdthe swell or binder of the shuttle box in the ,same position which itoccupies when a shuttle is in place therein, so that the usual stopmotion of the loo-m will not be actuated by the position of the swell orbinderof the empty shuttle box.

In the modifiedconstruction shown in Fig. 5, the arm 9 of the bell cranklever Gr is connected by means of a cord or wire I to the arm 6', whichis connected tothe lever .6. Consequently, when "the bell crank lever Gis actuated, the end of the arm 0 is raised, thus holding this arm outof engagement with the cam 0 and thereby preventing the actuation of thestop motion.

The mechanism described can be very easily applied to looms and addsvery little to the cost of the same. The mechanism cfl'ects a greatsaving in labor when the loom is used for weaving fabric to behemstitched, since the removing of weft threads has heretofore been doneby hand. A considerable amount of yarn is also saved by omitting theweft threads 'in the parts of the fabric to be hemstitched.

The mechanismdoes not in any way interfere with the operation of thestop motion of the loom when the loom is used inthe usual manner, butmerely renders the stop motion inoperative while the portion of thefabric which is to behemstitched is being formed.

1 claim as my invention: r

l. a weaving machine, the combination with weft-detecting meansfor'stopp-ing the machine when the weft is omitted-of means forrendering said weft-detecting means inoperative to permit a portion ofthe workto be. formed without weft threads.

2- In a weaving machine, the combination with weftdeteeting means forstopping the machine when :the weft is omitted, of means operated by apattern making mechanism to actuate "a box motion, means connectedwi-t hsaid box motion actuating means to render said weft-detecting meansinoperative to permit a portion of the work to be formed without weftthreads.

3. In a drop box loom, the combination with weft-detecting means forstopping the loom when the weft is omitted, and means foractuating a boxmotion, of a connection between said actuating means and-said means forstopping said loom'to render said stopping means inoperative to permit-a portion of the work to be formed without weft threads.

4:. In a drop box loom, the combination of -a pattern making mechanism,a box raising "lever operated by said pattern making mechanism, a stopdevice for said loom, and means connected with-said lever to render saidstop device inoperative to permit a portion ofthe work to be formedwithout weft threads.

5. In a drop box loom, the combination of'a pattern making mechanism, abox raising lever operated by said pattern making mechanism, and a stopdevice for said loom including a weft detector fork and an actuatinglever, and means operablewhen it'is desired to omit weft threads fromthe work which prevents said fork and actua'ting lever fromactuatingsaid stop device. y

"6. In a drop box loom, the combination "of a box raising lever, a stopdevice for said eaaeee a box; raising lever, a stop device for said.loom including a vveft detector fork and an actuating lever, and meansoperated by said box raising lever for preventing said actuating leverand said fork from engaging to actuate said stop device.

8. In a drop box loom, the combination of a box raising lever, a stopdevice for said loom including a Weft detector fork and an actuatinglever, and a device operated by said box raising lever for preventingsaid fork from being engaged by said actuating lever to stop theoperation of the loom.

9. In a drop box loom, the combination of a box raising lever, a stopdevice for said loom including a Weft detector fork and an actuatinglever, and a member connected with said box raising lever and adapted tomove said fork into a position in which it cannot be engaged by saidactuating lever to stop the loom, when said box raising lever isactuated.

10. In a drop box loom, the combination of a box raising lever, a stopdevice for said loom including a Weft detector fork and an actuatinglever, and a connection between said box raising lever and saidactuating lever for holding said actuating lever in a position in whichitcannot engage said fork to stop the operation of the 100111.

Witness my hand this 5th March, 1920.

ARTHUR A. DAVENPORT. lVitnesses:

J AMES MEIKLEJOHN, GEORGE MONT.

day of

